EP0792083B1 - Verfahren zum Steuern eines Mikrowellenofens zum Vermeiden des Übergarens kleiner Speiseportionen - Google Patents

Verfahren zum Steuern eines Mikrowellenofens zum Vermeiden des Übergarens kleiner Speiseportionen Download PDF

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Publication number
EP0792083B1
EP0792083B1 EP97301095A EP97301095A EP0792083B1 EP 0792083 B1 EP0792083 B1 EP 0792083B1 EP 97301095 A EP97301095 A EP 97301095A EP 97301095 A EP97301095 A EP 97301095A EP 0792083 B1 EP0792083 B1 EP 0792083B1
Authority
EP
European Patent Office
Prior art keywords
food
weight
cooking
cooking time
time
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97301095A
Other languages
English (en)
French (fr)
Other versions
EP0792083A2 (de
EP0792083A3 (de
Inventor
Kwang-Keun Kim
Seok-Weon Hong
Kang-Kwang-Seok
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP0792083A2 publication Critical patent/EP0792083A2/de
Publication of EP0792083A3 publication Critical patent/EP0792083A3/de
Application granted granted Critical
Publication of EP0792083B1 publication Critical patent/EP0792083B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6408—Supports or covers specially adapted for use in microwave heating apparatus
    • H05B6/6411—Supports or covers specially adapted for use in microwave heating apparatus the supports being rotated
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/6464—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using weight sensors

Definitions

  • the present invention relates to an oven, such as a microwave oven and a method of controlling cooking with the oven.
  • Japanese Laid-open Patent No. Sho 62-087066 filed on April 10, 1987, discloses an apparatus for displaying an error when a controller senses that the food has been placed on a tray in a cooking chamber.
  • This apparatus stores a tray weight in the controller, and thus any sensed weight that is above the stored tray weight when the tray acts upon a weight sensing mechanism, represents the weight of the food.
  • US Patent 4 615 405 and Japanese Laid-open Patent Publication 96-320123 disclose microwave ovens having a weight sensor for sensing the weight of food on a tray of a microwave oven.
  • the US Patent discloses that the cooking time period is calculated as a function of the sensed food weight.
  • Japanese Utility Model Publication (unexamined) No. 90-83891 discloses a microwave oven that includes a spin chuck table, a rotary tray located on the spin chuck table, and a tray elevating device which raises the tray to a prescribed height.
  • the tray elevating device goes into action, the tray is elevated after being disjoined from the spin chuck table. The tray then rotates, and microwaves generated by a magnetron are uniformly transferred, even to the bottom of the tray.
  • a conventional microwave oven depicted in Figure 5 includes: a metallic cabinet 10; a cooking chamber 11 within the cabinet; a magnetron (not illustrated) which feeds microwave radiation into the cooking chamber 11; a step up voltage transformer 13 which supplies high voltage, above mains voltage, to the magnetron; an electric resistance heater 17 that is mounted in the cooking chamber 11 to cook foodstuffs in the cooking chamber 11 by radiant and convective heat; and a food tray 12 at the bottom of the cooking chamber, which can be elevated and rotated about a vertical axis.
  • a door (not illustrated) is provided on the front side of the cooking chamber 11, and a cooling fan is provided at the rear of the electrical component compartment 14.
  • the heater 17 can be rotated between horizontal and vertical positions for different modes of cooking.
  • the oven also includes a shaft 31 having an upper end connected with the bottom of the tray 12 and a lower end extending downward to the outside of the cooking chamber 11; an elevation guide member 34 positioned under the shaft 31 to elevate the shaft 31, an elevating motor 33 that reciprocates the elevation guide member right and left; a motor 32 that rotates the shaft 31 by means of a gear 32a; and a weight sensing unit 35 that is provided under the elevation guide member 34 to measure the weight of a foodstuff on the tray 12.
  • the microwave radiation from the magnetron at a frequency of about 2,450 MHz produces rapid heating of food on the tray.
  • the oven can perform fast cooking of foods by using microwave energy from the magnetron or heat from the resistive heating element, or both, whilst rotating the tray or moving it up or down.
  • the tray is elevated to a predetermined height initially, at the start of the cooking operation.
  • the tray is rotated and foodstuffs on the tray 12 is cooked by the microwave energy generated by the magnetron and/or the heater 12 for a time selected by the user on a key input panel (not illustrated). If the user selects cooking modes such as a warm mode, a thaw mode and the like, the magnetron is operated. If the user selects a grill mode, barbecue mode or pizza-baking mode, the heater is operated. In addition, the cooking can be achieved by using the magnetron and the heater simultaneously.
  • the food cooked in a conventional microwave oven may be fully cooked before the set cooking time has elapsed, particularly when the user cooks a small quantity of food. As a result, the food can be excessively boiled or burned. Also, in that case, the magnetron and the heater will have been driven for an unnecessarily long time, thereby wasting energy.
  • the present invention provides an oven characterised by means to select a cooking period which is independent of food weight for sensed weights thereof less than a predetermined reference weight.
  • the invention also includes a method of controlling a cooking time period for cooking food in a cooking chamber of an oven to prevent overcooking of small food portions, the method comprises the steps of:
  • a microwave oven in accordance with the invention includes a cooking chamber 11, a magnetron 16 which is provided in an electrical component compartment 14 to emit microwave radiation into the cooking chamber 11, and a high voltage generator 13 which supplies high voltage, relative to mains voltage, to the magnetron 16.
  • An electric resistance heater 20 is mounted on the upper side of the cooking chamber 11 to cook foodstuffs in the cooking chamber 11 by radiant and convective heat.
  • a rotary tray 12 is provided at the bottom of the cooking chamber 11, which can be raised and lowered along its vertical rotation axis.
  • the tray is mounted on a vertically extending shaft 43.
  • a motor 42 delivers torque to a rotary gear 42a which meshes with a gear 42b so as to rotate the shaft 43 and the tray 12.
  • the shaft 43 is connected by a spline to the gear 42b to enable the shaft to move vertically with respect to the gear 42b.
  • An elevation mechanism 44 actuated by a motor 41, is positioned under the shaft 43, for moving the shaft 43 and the tray 12 up and down.
  • the elevation mechanism 44 may correspond to that disclosed in GB-A-2 302 491.
  • a conventional weight sensing mechanism 45 is provided for weighing the tray 12 and any food disposed thereon, when the tray is in its lowermost position, i.e., when the shaft 43 rests upon the weighing mechanism. By subtracting the weight of the tray and shaft from the weight sensed by the mechanism 45, the food weight can be obtained. Any suitable weight sensing mechanism 45 can be utilised, such as that disclosed in the aforementioned US Patent No. 4 615 405 and Japanese Laid-Open Publication 96-320123.
  • the main control circuit of the microwave oven includes a control portion 100 which controls the overall operation of the microwave oven from the start of cooking to completion, a power input portion 110 which furnishes the control portion 100 with the electric voltages and current appropriate for its operation, a manually operable key operating portion 120 used to input to the oven a desired cooking mode and cooking time.
  • a display portion 130 displays various messages and cooking conditions during operation, and a heater driving portion 150 controls the microwave oven's heater 20.
  • the cooking method includes, in general, the steps of:
  • step S10 the user puts the food on the tray 12 and selects a desired cooking mode.
  • the controller determines whether a cooking start command has ben input (step S12), and then senses the weight W FOOD of the food (step S14).
  • the rotary motor 42 is driven, whereupon the shaft 43 connected with the tray 12 rotates, so that the tray 12 is also rotated.
  • the elevating motor 41 is not operated, so the shaft 43 rotates at its lowest position.
  • the rotating shaft 43 presses against the weight sensing portion 45 by a force dependent upon the weight of the tray 12, shaft 43, and the food.
  • a known output waveform emitted when there is no food on the tray 12 is compared with an output waveform detected when there is food on the tray 12, thereby enabling the food weight W FOOD to be calculated.
  • the microwave oven compares the food weight W FOOD with a predetermined minimum weight W MIN (step S16), and determines a maximum allowable time T MAX for driving the magnetron if the weight W FOOD is less than the minimum weight W MIN (step S18).
  • the tim T MAX is the same regardless of how much the food weight is below W MIN .
  • the minimum weight W MIN is set to be 300 grams including a weight of a container in which the food is disposed.
  • W FOOD is lower than 300 grams, e.g. 250 grams, in the food weight comparing step S16.
  • T MAX the maximum allowable time
  • step S20 the controller counts a time during which the magnetron has been driven (step S20), determines whether the counted time is longer than the maximum allowable time T MAX , and returns to the magnetron driving step S20 when the counted time is not longer than the maximum allowable time T MAX (step S22).
  • the microwave oven stops the magnetron (step S24). If the user had manually selected a cooking time, which was less than T MAX , then the cooking would have terminated at the end of such manually set time period. If the manually selected time was greater than T MAX , the cooking would have terminated when T MAX was reached.
  • the microwave oven determines a cooking time for driving the magnetron, when the food weight W FOOD is not less than the minimum weight W MIN in the food weight comparing step S14 (step S26). That is, when the food weight W FOOD is greater than the minimum weight W MIN , the cooking time is calculated by a program already stored in the control portion according to a cooking mode, or by the sensed food weight in an automatic cooking case. Alternatively, the user can determine a cooking time by way of a manual selection.
  • the microwave oven counts a time during which the magnetron is driven (step S28), determines whether the counted time is longer than the predetermined cooking time, and returns to the magnetron driving step S28 when the counted time is not longer than the predetermined cooking time (step S30)
  • the tray 12 can be elevated by the elevation mechanism 44.
  • the present invention drives a magnetron and heater no longer than a maximum allowable time when the food quantity is less than a minimum weight value, irrespective of any user selected cooking time. Accordingly, the present invention prevents the overcooking of small food portions, and also prevents the magnetron and/or heater from being driven for an unnecessarily long time, thereby reducing the power consumption.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Claims (10)

  1. Herd (10-14) mit einer Einrichtung (45) zum Wiegen von zu garender Speise und einer Einrichtung (100) zum Steuern der Garzeit der Speise, gekennzeichnet durch eine Einrichtung zum Wählen einer maximalen Garzeit (TMAX), die für abgefühlte Speisegewichte, die kleiner als ein vorbestimmtes Bezugs-Speisegewicht (WMIN) sind, unabhängig von Speisegewicht (WSPEISE) ist.
  2. Herd nach Anspruch 1, der einen Mikrowellenherd aufweist.
  3. Herd nach Anspruch 2, mit einem elektrischen Heizelement (20) für Strahlungsheizung der zu garenden Speise.
  4. Herd nach einem der vorhergehenden Ansprüche, mit einer Einrichtung zum automatischen Einstellen der Garzeit als Funktion des abgefühlten Speisegewichts für Gewichte oberhalb des Bezugsgewichts.
  5. Verfahren zur Steuerung einer Garzeit zum Garen von Speise in einer Garkammer eines Herdes, um Übergaren von kleinen Speiseportionen zu verhindern, mit folgenden Verfahrensschritten:
    a) Abfühlen des Gewichts der Speise,
    b) Vergleichen des Gewichts mit einem Bezugsgewicht und
    c) Einstellen einer maximalen Garzeit, wenn das Speisegewicht kleiner als das Bezugsgewicht ist, wobei die maximale Garzeit unabhängig von dem Betrag, um den das Speisegewicht unterhalb des Bezugsgewichts liegt, die gleiche ist.
  6. Verfahren nach Anspruch 5, mit manuellem Eingeben einer Garzeit, wenn das Speisegewicht unterhalb des Bezugsgewichts liegt, und Beenden eines Garbetriebs, wenn die im Verfahrensschritt c eingestellte maximale Garzeit erreicht ist, unabhängig davon, ob die manuell eingegebene Garzeit die im Verfahrensschritt c eingestellte maximale Garzeit übersteigt.
  7. Verfahren nach Anspruch 5, das weiterhin die Verfahrensschritte umfaßt, einen Garmodus zu wählen, automatisch eine Garzeit einzustellen, wenn das Speisegewicht größer als das Bezugsgewicht ist, wobei die Garzeit als Funktion des ausgewählten Garmodus und/oder des Speisegewichts ermittelt wird, und entsprechend langes Garen der Speise.
  8. Verfahren nach Anspruch 5, das weiterhin den Verfahrensschritt umfaßt, manuell eine Garzeit einzugeben und die Speise die manuell eingegebene Garzeit lang zu garen, wenn das Speisegewicht größer als das Bezugsgewicht ist.
  9. Verfahren nach Anspruch 5, bei dem Verfahrensschritt a umfaßt, einen ersten Gewichtswert zu erhalten, der das Gesamtgewicht der Speise und einer Speisetragvorrichtung darstellt.
  10. Verfahren nach einem der Ansprüche 5 bis 9, welches umfaßt, die Speise mit Mikrowellenstrahlung oder Strahlungswärmeenergie oder Konvektionswärme zu garen.
EP97301095A 1996-02-23 1997-02-20 Verfahren zum Steuern eines Mikrowellenofens zum Vermeiden des Übergarens kleiner Speiseportionen Expired - Lifetime EP0792083B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9604362 1996-02-23
KR19960004362 1996-02-23

Publications (3)

Publication Number Publication Date
EP0792083A2 EP0792083A2 (de) 1997-08-27
EP0792083A3 EP0792083A3 (de) 1998-01-28
EP0792083B1 true EP0792083B1 (de) 1999-07-28

Family

ID=19451662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97301095A Expired - Lifetime EP0792083B1 (de) 1996-02-23 1997-02-20 Verfahren zum Steuern eines Mikrowellenofens zum Vermeiden des Übergarens kleiner Speiseportionen

Country Status (9)

Country Link
US (1) US5859413A (de)
EP (1) EP0792083B1 (de)
JP (1) JP3162314B2 (de)
KR (1) KR100218961B1 (de)
CN (1) CN1097702C (de)
DE (1) DE69700344T2 (de)
MY (1) MY120921A (de)
RU (1) RU2124279C1 (de)
TW (1) TW423264B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003298816C1 (en) * 2002-12-02 2010-12-16 Amgen Fremont, Inc. Antibodies directed to Tumor Necrosis Factor and uses thereof
DE602004025351D1 (de) * 2003-07-23 2010-03-18 Lg Electronics Inc Mikrowellenofen
KR101132330B1 (ko) * 2004-08-04 2012-04-05 삼성전자주식회사 조리장치 및 조리방법
RU2539458C2 (ru) * 2009-12-30 2015-01-20 Арчелык Аноним Ширкети Печь
TWI428545B (zh) * 2010-10-01 2014-03-01 Yu Chieh Lin 防止燒乾之爐具及其方法
CN102444914B (zh) * 2010-10-14 2015-03-18 林有健 防止烧干的炉具及其方法
CN105982509A (zh) * 2015-02-05 2016-10-05 佛山市顺德区美的电热电器制造有限公司 烹饪电器及其控制方法
CN109662611A (zh) * 2017-10-17 2019-04-23 松下知识产权经营株式会社 自动制面包机
CN109696840A (zh) * 2017-10-24 2019-04-30 佛山市顺德区美的电热电器制造有限公司 烹饪器具及其料理烹饪控制方法和装置

Family Cites Families (11)

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CA1183907A (en) * 1980-09-24 1985-03-12 Wesley W. Teich Heating time coupling factor for microwave oven
JPS60131793A (ja) * 1983-12-20 1985-07-13 松下電器産業株式会社 自動高周波加熱装置
US4615404A (en) * 1984-02-17 1986-10-07 Peschl Ivan A S Z System for measuring container weight in the field independent of wind load
JP2534702B2 (ja) * 1987-04-10 1996-09-18 株式会社東芝 調理器
JPH03282124A (ja) * 1990-03-30 1991-12-12 Toshiba Corp 加熱調理装置
JPH05187643A (ja) * 1992-01-10 1993-07-27 Sharp Corp 電子レンジ
FR2701093B1 (fr) * 1993-02-02 1995-04-14 Moulinex Sa Appareil de cuisson comportant un dispositif de dorage et un dispositif de génération d'énergie micro-ondes et procédé de commande de cuisson d'un tel appareil .
FR2703481B1 (fr) * 1993-04-01 1995-05-12 Moulinex Sa Four de cuisson et son tableau de commande.
SE502883C2 (sv) * 1994-06-13 1996-02-12 Whirlpool Europ Styrförfarande för en mikrovågsugn, mikrovågsugn och dess användning för tillagning/uppvärmning av en matvara enligt styrförfarandet
KR100210067B1 (ko) * 1995-06-15 1999-07-15 윤종용 전자렌지의 턴테이블 구동장치
JP2744778B2 (ja) * 1996-05-14 1998-04-28 シャープ株式会社 加熱調理器用重量検出装置

Also Published As

Publication number Publication date
RU2124279C1 (ru) 1998-12-27
US5859413A (en) 1999-01-12
DE69700344T2 (de) 2000-01-27
MY120921A (en) 2005-12-30
DE69700344D1 (de) 1999-09-02
JP3162314B2 (ja) 2001-04-25
KR970062539A (ko) 1997-09-12
EP0792083A2 (de) 1997-08-27
EP0792083A3 (de) 1998-01-28
KR100218961B1 (ko) 1999-09-01
JPH09251890A (ja) 1997-09-22
CN1165272A (zh) 1997-11-19
CN1097702C (zh) 2003-01-01
TW423264B (en) 2001-02-21

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